The veteran actress, whose TV credits include Eight Is Enough and Oz, will guest-star during Season 3 of Supergirlas the adoptive mother of Odette Annable’s Samantha (aka Reign), TVInsider.com reports.

Buckley’s Patricia Arias — who makes her first appearance in Episode 7 — and her future-villain daughter have been estranged since Sam became a teen mom. Their relationship is complicated by the secrets Patricia holds… about Sam’s otherworldly origins?

Supergirl Season 3 premieres Monday, Oct. 9 at 8/7c on The CW.

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* Disney Channel will air a movie musical update of Freaky Friday in 2018, with Heidi Blickenstaff (the stage production of Freaky Friday) and Cozi Zuehlsdorff (the Dolphin Tale movies, Mighty Med) starring as the mother and daughter, respectively.